Urban air pollution and chronic obstructive pulmonary disease-related emergency department visits
M A Arbex, G M de Souza Conceição, S P Cendon, F F Arbex, A C Lopes, E P Moysés, S L Santiago, P H N Saldiva, L A A Pereira, A L F Braga
Journal of Epidemiology & Community Health Oct 2009, 63 (10) 777-783; DOI: 10.1136/jech.2008.078360